<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>09_绝对定位</title>
    <style>
        .fu{
            background-color: #ff0 ;
            position: relative;
            width: 500px;
        }
        .fu>div{
            width: 100px;
            height: 100px;
        }
        .z1{
            background-color: #f00 ;
        }
        .z2{
            background-color: #0f0 ;
            /*绝对定位：脱离文档流，释放布局空间
            移动参照物：离自己最近的，有非静态定位属性的上层元素，终点是html */
            position: absolute;
            top:0;
            right: 0;
        }.z3{
            background-color: #00f ;
        }
    </style>
</head>
<body>
<div class="fu">
    <div class="z1"></div>
    <div class="z2"></div>
    <div class="z3"></div>
</div>
</body>
</html>